di·a·to·ma·ceous earth (d   -t-m  shs, d- t-)n. A powder made of the desiccated shells of diatoms, used as a filtering agent, adsorbent, and abrasive in many chemical operations. |
earth
1. soil; softer part of the land, as distinct from rock.
2. metallic oxides in the form of unchangeable powder.
diatomaceous earth
a fine white powder composed of the siliceous skeletons of diatoms; used in treating diarrhea and as a feed additive. Called also infusorial earth, purified siliceous earth.
infusorial earth
see diatomaceous earth (above).
siliceous earth
see diatomaceous earth (above).
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